异戊二烯和四氟乙烯-丙烯共聚物的光化学接枝反应  

THE PHOTOCHEMICAL GRAFT COPOLYMERIZATION OF ISOPRENE TETRAFLUOROETHYLENE-CO-PROPYLENE

作　　者：黄骏廉[1] 吴海新[1] 

机构地区：[1]复旦大学材料科学研究所,上海200433

出　　处：《感光科学与光化学》1990年第3期186-191,共6页Photographic Science and Photochemistry

摘　　要：在紫外光作用下,二苯甲酮、蒽醌和安息香能通过夺氢反应使异戊二烯在四氟乙烯-丙烯共聚物中接枝,接枝反应按三重态自由基引发机理进行,接枝率随光照时间的增长而增加,但不会超过40％。和异戊二烯的自由基聚合反应不一样,接枝物中聚异戊二烯接枝链的微结构以3,4-和1,2-聚合为主,而前者以1,4-聚合为主。Ce^(+4)及Fe^(+2)-H_2O_2等氧化还原体系对该接枝反应不产生作用.极性溶剂四氢呋喃的加入,对接枝链微结构的影响很小。The graft copolymerization of isoprene on the surface of tetrafluoroethylene-co-propylene-could take place by abstracting the hydrogen atom from propylene in copolymer by benzophene anthroquinone and beizoin at UV irradiating- The graft reaction carries out on the mechanism of triplet radicals.The graft efficiency increases with the lengthening of irradiation time,but no more than 40%.The microstructure of grafting chain of polyisoprene is mainly composed of 3,4- and 1,2-polymerization of isoprene.And the polymerisoprene made by radical polymerization consisted of 1,4-polymerization of isoprene essentially.The redox initiation system used for this graft copolymerization,such as Ce+4 or Fe+2-H2O3 is ineffective.The polar solvent,for example THF,has little influence on the microstructure-of grafting chain of polyisoprene.

关 键 词：异戊二烯 四氟乙烯 丙烯 共聚 接枝 

分 类 号：O632.12[理学—高分子化学]